Coke oven door



R. E` UMBEL COKE OVEN DOOR Oct. 4, 1932.

Filed Jan. 11, 1930 WITNESS Patented Oct. 4, 1932 UNITED sTArss BOY E. UMBEL, or srRUTHER-sonro y COKE ovini Doon Application led. January 11,1930. Serial No. 420,030.

My invention is directed to improvement of the means for efectually sealing the doors of by-product coke ovens against -escape f )the various products of the coking process and also against the admission of air into the coking chamber'with resultant oxidation 0f its contents during the heating of the charge. By-product coke ovens of the type to which l this invention is particularly applicable are v usually constructed in batteries comprising a plurality of high and relatively narrow coking ovens spaced apart by suitable heating chambers disposed between adjacent ovens,

the ends of the ovens being provided with elongated doors having suitable locking means for holding them in place and adapted With the aid of a door machine to be removed bodily from the oven to permit removal of the coke and to be replaced in posit-ion for the 20.'.

beginning of the neXt coking cycle.

It has heretofore been the usual practice to provide the ovens with doors adapted to engage the door jambs of the form-er with' y, metal-to-metal contact of substantiallyplane 'surfaces and to then apply plastic clay around the perimeter of the door and against the door jamb, after the door is in place', in an attempt to form a satisfactorily tight joint,

30, This practice is disadvantageous both because of the difficulty of maintaining proper engagement to form a reasonably tight joint between the cooperating plane surfaces, espeeach coking cycle.

In an effort to avoid the disadvantages of* the practice just described, attempts have been made to form a more satisfactoryseal by Vproviding a groove in the door jamb for the reception of a sealing ring of someheat` resisting material such as asbestos rope, the ring projecting slightly above the face oflthe jamb in the absence of the door and being adapted to be compressed into the groove by the door When-the latter is forced into-andthereafter locked in position, th-e sealing ring then filling the space between the bottom of the groove and adjacent door surfaceregard.

less'of any slight irregularities or deformities in the latter. l

Although this construction is reasonably effective to seal the ov-en when the sealing ring is of proper size andin unbroken condition, in practice it-has beenfound virtually impossible toprevent breakage of the sealing ring when removingv the door, due to the fact thatv during the coking of the charge the sealing ring becomes permeated with viscous products such as coal tar and parts of the ring are thereby caused to adhere in the groove while other parts adhere to the door when the lat-y ter is removed from the oven. Thus each charge requires Vthat Yanew sealing ring be supplied and placed in position, entailing an undue expenditure of money, labor and time.

A primaryv object of my invention, therefore, is to avoid these and other disadvantages of the .door-sealing means heretofore employed through the provision of a novel form of self-sealing door which is ezdective throughout long periods of use to satisfac-l torily seal the oven against leakage ofboth liquids and gases and which is of appreciable economic advantage in that Vthe necessity of installing a new sealing ring after removal of each oven charge is obviated. Additionalv ly, in accordance with my invention l amable to substantially avoid the danger of damage to the sealing ring through inadvertence or"VV carelessness 1n removing or replacing the door.

A further object of the invention is the provision of a self-sealing coke oven door so constructed as to aord in effect a double seal against the' leakage from the coke oven ofV the products ofthe coking operation or thev Y Vadmission of air thereinto, one of the sealing means beingy effective under normal condi-A tions to prevent the passage Vto the other of the liquid and viscous products of the coking operation, vvliereby'permeation of the sealing ring forming part of thelast mentioned sealing means with said products is avoided and resulting adherence of the ring to the door Y When the latter is removed, With consequent partial or total destruction ofthe ring, is obviated.v j i Still further objects of the invention arev structed in accordance with the invention, the

the provision of a self-sealing coke oven door which may be readily applied to and used in` connection with theusual forms of commercial coke ovens and which can be removed and replaced on the oven in exactly the same way and through the medium of the same type door machines as are at present emn ployed; which is comparatively lowin cost; which is simple in design and construction and which is thoroughly satisfactory for the performance of its intended function. 7

Other objects, advantages and novel features of design,rconstruction and arra'nge ment comprehended by my invention are hereinafter more particularly pointed out or will be apparent to those skilled in the art from' the following description of one form'of'the invention as illustrated inthe accompanying drawing, in which Fig. 1 is a front elevation, partially broken away into section, -ofa portionof a coke oven provided with a doorcondoor being shown in place on the oven; Fig. 2 is a vertical section thereof on the line 22 in Fig. 1 and Fig; 3 is an enlarged horizontal section on the line 3-3 in Fig. 1, the same characters of reference being used to designate the same parts in the several figures. v

Referring now more particularly to the drawing, the coke oven therein shown is of the door jamb, and in it I provide a V-shaped groove 4 extending continuously around the jamb and enlarged at its bottom tosubstantially circular crosssection, thus providing a` substantially cylindrical continuously eX,- tending channel 4 within the jamb adapted to receive the sealing ring 5 which is sub# stantially coextensive with the cylindrical portion of the channel. Asbestos rope is a preferred material for the sealing ring, but,

it will be understood that anyother suitable heat resisting, somewhat resilient packing material may be employed as desired andl inserted` into the channel 4f through the groove 4, its resiliency desirably being such that it may be forced 4through the groove in a somewhat compressed condition so las to expand and substantially entirely fill the channel 4 when, seated therein;V The inner peripheral corner adjacent theouter surface 2il of the door frame is desirably conveXlv curved on a relatively large radius,-as shown' at 6, for a purpose which will hereinafter appear while the lateral plane surface 2b of the frame extends inwardly from the curved surface 6 and defines the oven door opening.

The removable door 8 is of usual construction, save in the particulars hereinafter mentioned, and thus may be in the form of a vsingle casting provided with a flange 9 eX- to the lateral surface 2b of the frame when the door is in place. On its outer face the door is provided with a continuous stiifening rib 11 and transversely extending vertically spaced strengthening webs 12 adjacent the upper andY lower of which sockets 13 are provided to receive the arms of the door machine by means of which the door is removed from or placed upon the oven in the usual way. f

For holding the door in positionon the doorframe any suitable means maybe em'- ployed such as a plurality of rotatable locking bars 14 pivotally secured to the door, the

bars being so arranged that when in hori-4 zontal position as shown their extremities will extend beneath flanges 15 disposed on vertically extendingchannel beams 16 arranged on opposite sides of the door opening. To enable the door to be forced tightly against the door jamb after the ends ofthe locking barsl are engaged beneath the flanges' 15, each of the locking bars is mounted in the usual'way on a bolt 18 which extends into a bushing 19 disposed in a pocket formed'in a boss 2O on the outer face of the door; this bolt not only forms a pivot about which the locking bar may be rotated, at least for a distance sufficient to disengage its ends from the flanges 15 whenthe dooris to be removed,

but is also operative when rotated ina proper directionafter the lockingfbar is engaged beneath the flanges, to force the door tightly.

against the door jamb. As the locking means of this general character are well understood in the art, further description thereof would be superfluous.

About the peripheral edge of the door k8,

I provide a flange 25 `preferably cast in. Y

tegrally with the door and havingv on its inner surface 25a a continuous V-shaped rib 26 corresponding to the groove 4 in thejamb and adapted to register-'therewith when the door is in place that is, when the inner surface 25a of the fiange is disposed in substantial' parallelism with the outer surface 2a of the frame, the corner formed at the junctionk of the flange 9 andthe liange 25 being convcavely curved'as shown at 27 to correspondY to the conve-Xly curved surface 6 of the jambi" I Thus when the door is placed in position on the ovenby means'of the door machine, the rib 26 enters the groove 4 and compresses Cil f-,esaeee the sealing ring 5, and as the door is thereafter forced inwardly by operation of the pivot bolts 18, the curved surfaces 6 and 27 on the j amb and door respectively, are brought into intimate contact, thereby forming an effective liquid seal extending continuously peripherally of the door which is operative to prevent the viscous and adhesive liquid products ofthe coking operation from coming into contact with the sealing ring which is disposed in the channel 4 in the j amb outwardly of the curved surfaces 6 and 27 which together form the primary liquid seal, and is thus protected vfrom becoming' permeated with the said liquid products and consequent adherence to the door when the latter is subsequently removed.

Additionally, when the door is forced fully into place by suitable operation of the pivot bolts 18, the sealing ring 5 is compressed in the channel l by the V-shaped rib 26, and in conjunction with said rib forms an effective gas-tight seal against the escape of gaseous products which may pass through the liquid seal formed by the engagement of the rounded surfaces 6 and 27, as aforesaid. Moreover, because of the fact that that portion of the groove in which the sealing ring is seated lies below the surface 2 of the adjacent door jamb, the sealing ring is protected from becoming dislodged or damaged by inadvertence or carelessness when removing or replacing the door, while as the rib 26 can contact the sealing ring only when the door is in proper alignment with respect to the oven and after the apex of the rib has entered the groove, it is impossible for the rib to scrape or shear the ring, as while in contact therewith it can only move at right angles to the plane of the Vdoor jamb.

It will thus be apparent that in accordance with my invention I have provided a self-sealing coke oven doo-r construction comprising separate but cooperative sealing means which, acting together, prevent the escape from the coking oven of the liquid and gaseous products of the coking operatio-n and which is satisfactorily operative for the performance of this function not only when the door and door frame are in proper alignment andv normal condition but even after the door may have become warped through continued use, for in such case the tarry and other generally similar residues tend to enter any spaces formed between the primary sealing surfaces 6 and 27 through the warping or disalignment of the door and lill up the same quite rapidly, thus automatically sealing these spaces against leakage of further appreciable quantities of the said products. Of course as the appreciably resilient sealing ring disposed in the door frame is compressed considerably by the V-shaped rib 26 when the doorvis in place and in normal condition, the ring is equally operative to effect a satisfactory gas-tight seal even though the door b'e slightly warped.

I have herein described a preferred embodiment of my invention vwith some particularity as to form and relative position of the various elements employed therein, I do not thereby intend to limit myself'to any' precise details of construction and arrangement o-f the various parts as the same are capable of such modification as-may be desired so long as the same lies within thel spirit and scope of the invent-ion as defined in the appended claims. j Having' thus described my invention, I claim and desire to protect by Letters Patent of the United States:

l. In combination with a coke oven, a door frame carried by the oven walls, defining an opening into the oven chamber and comprising a generally rectangular body substantially symmetrical in transverse section and having a convex longitudinally continuous curved surface adjacent said opening and a pair of continuous plane surfaces disposed substantially normal to each other and respectively adjoining the edges of said curved surface, one of said plane surfaces extending substantially parallel to the adjacent face of the oven wall and having a continuous convergent groove extending longitudinally thereof and an enlarged substantially cylindrical continuous recess inwardly offset from said surface and communicating with said groove, resilient packing material disposed in said recess, an oven door comprising a metallic body having an integral frame adapted to project angularly inwardly into said opening when the door is in position on the oven and another flange adapted to extend in substantial parallelism lwith said grooved plane surface of the frame when the door is in said position, said flanges together bounding a concave curved surface substantially congruent with the curved surface on the frame and adapted to contact therewith. and a V-shaped rib carried by the second mentioned flange in registry with said groove and operable to simultaneously contact the walls thereof-and to compress said packing material when the door is operatively disposed in said opening, and means for'maintaining the door in said position.

2. Closure means for a coke oven comprising a substantially continuous door `frame defining a port, said frame having an endless recess of' substantially circular cross section disposed internally thereof and an outwardly divergent groove extending from said recess to an adjacent `surface of the frame, packing disposed in said recess, the diameter of said packing being substantially greater than the width of said gro-ove adj a.- cent the recess, the said frame having a convex continuous curved surface spaced from said groove and adjacent said port, and a,

sov

door cooperafivewith said frame and comprising an integral body having a continuous marginal fianffe provided Wlth a project1 ing rib having convergent side Walls adapted. i to engage the divergent Walls of said groove and simultaneously to compress said packing when the door is in position in the port, and

another flange adapted to eXend ntosaid oven and separated from the rst-mentioned flange by a concave curved surface adapted to contact the curved surface on the frame when the doorJ is in said position.

In Witness Whereof,l have hereunto set my hand this/7th day of January, 1930.

f ROYv E. UMBEL. 

